import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: WHY
 * Date: 2023-04-20
 * Time: 22:22
 */
class  ListNode{
       int val;
        ListNode next;
        ListNode(){}
        ListNode(int val){this.val=val;}
     ListNode(int val,ListNode next){this.val=val;this.next=next;}
       }


public class Test  {
    public static void main(String[] args) {
        Scanner scanner =new Scanner(System.in);


    }
}
